I'm not sure if anxiety is relevant for how strong HPPD/VSS symptoms are. Is it a factor?
In any case, here are a list of supplements and herbs I used for anxiety in order of effectiveness from personal experience.
Erythrina Mulungu, A combination of l-arginine/l-lysine, l-theanine (you should get: suntheanine ®), Scutellaria Galericulata (I used this in high doses, however expensive), magnesium (400mg daily), --
5-HTP
l-tryptophan ashwaganda, passionflower, california poppy, valerian, lemon balm, hops, gingko biloba,
GABA
rhodolia rhodesia,
If this helps anyone that's good, What are your supplements you have used against anxiety? Also if someone can provide an answer to the question if anxiety plays a role in HPPD/VSS symptoms that would be much appreciated.